Recognition of the benefits to trauma-informed approaches is expanding, along with commensurate interest in extending delivery within school systems. Although information about trauma-informed approaches has quickly burgeoned, systematic attention to integration within multitiered service delivery frameworks has not occurred yet is essential to accurate, durable, and scalable implementation. In addition, there is a critical need to concurrently build a strong evidence base regarding trauma-informed service delivery in schools. In this paper, the literatures on trauma-informed approaches and multitiered frameworks for school-based service delivery are connected with the goal to provide suggestions toward building blueprints for trauma-informed service delivery in schools. Drawing from the literature on implementation blueprints for school-wide positive behavior supports, sections are organized around current knowledge about trauma-informed approaches with regard to blueprints for (a) implementation, (b) professional development, and (c) evaluation. Critical issues, strategy recommendations, and directions for research are discussed. [For the corresponding grantee submission, see ED575023.]